refactor: moved darwin, home-manager, and system configurations to dendrite pattern

modules/system/nix-development.nix

@@ -0,0 +1,28 @@
+{...}: {
+  flake.commonModules.nix-development = {
+    lib,
+    pkgs,
+    config,
+    inputs,
+    ...
+  }: {
+    options.host.nix-development.enable = lib.mkEnableOption "should desktop configuration be enabled";
+
+    config = lib.mkMerge [
+      {
+        host.nix-development.enable = lib.mkDefault true;
+      }
+      (lib.mkIf config.host.nix-development.enable {
+        nix = {
+          nixPath = ["nixpkgs=${inputs.nixpkgs}"];
+        };
+        environment.systemPackages = with pkgs; [
+          # nix language server
+          nil
+          # nix formatter
+          alejandra
+        ];
+      })
+    ];
+  };
+}